Removed redundant code.

"Are you sure?" confirm box already referenced on [Line 45](https://github.com/FaisalAbid/Simvla-Network/blob/master/app/views/posts/_form.html.erb#L45) of **/app/views/posts/_form.html.erb**, causing the confirm box to appear twice after a user clicks the *Delete* button on a post.
Merge pull request #13 from sweinberg/patch-1

Removed redundant code.